Do All Senior Pets Get Cancer? New Hope in Pet Cancer Care

Whilst we huddle indoors to escape the August chill and the inevitable winter rain, it is the perfect time to talk about something that usually feels heavy, but is actually becoming one of the most hopeful areas of pet cancer care.

Behind the scenes, a field called ‘Comparative Oncology’ is helping researchers understand cancer in new ways—and opening exciting possibilities for future pet cancer care.

This isn’t just about treating disease; it’s about finding better ways to protect our pets’ quality of life and, where possible, give them more good time with us. And first, some reassurance: no, not every senior pet will develop cancer.

Why Is Pet Cancer Care Changing Now?

It’s a question every pet parent asks: “Why does it feel like every pet is getting cancer?” The answer is actually a bit of a backhanded compliment to modern pet parents.

Because we are taking better care of our dogs and cats than ever before—protecting them from predators, infectious diseases, and poor nutrition—they are living long enough to face the challenges of ageing.

But there’s a second factor: The Shared Environment. Our pets breathe the same air and walk on the same floors we do.

This makes them “sentinels” for health. This realisation has sparked a powerful new movement that is changing the game for your pet.

The NCI Comparative Oncology Program: Hope in Action

One of the most proactive forces in the world right now is the National Cancer Institute’s (NCI) Comparative Oncology Program. This program treats pets as heroes.

Because the cancers found in dogs and cats share remarkable similarities with cancers in humans, scientists are studying promising new cancer treatments in pets with naturally occurring cancers, helping researchers learn more about treatments that may benefit both pets and people.

For some pets, specialist referral or clinical trials may provide access to emerging therapies that weren’t available just a few years ago.

It’s a proactive, two-way street where research involving pets can advance our understanding of cancer, whilst some veterinary patients may benefit from access to promising new approaches.

The Immunotherapy Revolution: A New Way to Fight Cancer

Cancer care is becoming more personalised, with newer approaches adding to established treatments such as surgery, chemotherapy and radiation. The most exciting development is Immunotherapy.

Unlike traditional treatments that can be tough on a pet’s system, immunotherapy works by “unmasking” the cancer so the pet’s own immune system can do what it was born to do: fight.

Some approaches are already used for certain cancers, whilst others remain under research or in clinical trials.

• Cancer Vaccines: Imagine a vaccine that tells your dog’s body to hunt down and destroy bone cancer cells. These are becoming a reality.
• Targeted Biologicals: These treatments are designed to act on specific features of cancer cells. For some cancers, this may allow a more targeted approach, although every pet can respond differently.

The August “Indoor” Checklist

Since we’re spending more time inside this month, use these moments of indoor bonding to be proactive. Finding cancer earlier can give your veterinary team more options and more time to consider the most appropriate treatment plan.

• The “Lump Audit”: As you’re drying your dog off after a rainy walk or brushing your cat by the heater, feel for new bumps. Anything larger than a pea that stays for more than two weeks should be checked.
• The “Quality of Life” Shift: For some cancers, treatment can focus on managing the disease while protecting comfort and quality of life. The goal is always to consider what gives your pet the best possible days.

The Bottom Line

Old age does not automatically mean cancer. And cancer does not automatically mean there is nothing more you can do.

Cancer care is changing. With earlier detection, evolving treatments and care built around your pet, there may be more options—and more good days ahead—than you realise.

At Lilydale Vet Centre, we’re here to help you find those options whilst protecting what matters most: your pet’s comfort, happiness and quality of life.